DOUG @ ECS

Looks like you are on your way to getting this set up correctly. If you have any questions feel free to call or PM me.


BTW, I laughed at the guys that think we make parts just to make money. Yes this is a business, but we makes parts to make our customers car faster then the others, you get the by products of that. I spend my life data logging cars and the negative or positive effects that come along the way. When I see ten cars with the same problem, we go to work on a fix, if you haven't seen an issue we have, you probably don't push your vehicles like we do.

ironhorse583

nothing wrong with the 8rib setup..was prepping to go YSI is all..ended up spending the cash on 6L80 to 4L60 swap..

For every1 not having any issues with the cog - how aggressive do you drive.? I need the system to be reliable on the street as well as at the track (1/4 mile).

realcanuk

I didn't mean to say you do it just to make money. I said it is probably the best thing going at the moment.
What amuses me is that once a new thing comes out, what was working for years becomes garbage.

Its like saying that because the C7 came out, a C6 just cant cut it any more.

Xtremespeed

Thanks for the reply Doug. I sent you a pm.

Unreal

Beat the crap out of it. Tons of miles, and easily 25+ 1/2 mile passes in the last year.

ajrothm

When I was running just the DP direct drive with the 4 rib AC belt running everything, I never had a HUGE problem. I would occasionally see voltage drop in logs, nothing major and then it would usually catch up and grab. I had 8k miles on my original 4 rib belt and countless highway hits... And this is spinning a 170 amp alternator loaded down. I never heard it or felt it slip, nor see the voltage drop on the dash.. But the logs showed it, especially on 1.3x 60' launches.

I mainly went to the cogged direct drive mod since I had the engine out anyway, other wise I may not have done it, at least until it acted up more. Mine is a C5 with the dual idler tensioner on the AC belt tho and I'm sure that helps.

I will be driving my car more this weekend and making some test hits and I'll keep an eye on the cog belt and look for anything going wrong on it. So far it's been fine, I just tightened the adjuster/eccentric by hand and just enough to take some slack out of the bottom run of the belt.--as seen in my pic. I had no instruction on adjustment, I just winged it.

Making sure stuff is aligned right will make all the difference with a cog belt.

Arctic Vette

Did you get the cog straight xtremespeed?

Xtremespeed

Got another belt on it but no time to test tonight. I tried just barely taking the slack out on the bottom side leaving the top a little loose. Matt at FSP suggested 1/4" slack when warmed up as a general rule for cogs. Hopefully that idea along with the info in this thread will get it. I just can't see anything out of alignment especially with the other 3 belts running perfect. The cog belt looks to be running dead center on the small pulley. I'm sure it was a tension issue. The first one was a little tight and the second was real tight, thinking that the first one was too loose.

Arctic Vette

Wish u luck bud..

Xtremespeed

Did some back road testing today. Still not driving too hard due to the startup tune still being in there, and not having the Alky setup configured, but I believe the problem is solved. Special thanks to Unreal and especially ajrothm for providing the proper tensioning procedure. Tightened the belt just enough to take up the slack at the bottom and left it slightly loose on the top and the belt seems to be running perfect. Will know more once the tune is ironed out, but for now it appears to be working great. Thanks again guys.

Arctic Vette

Glad to hear that Xtreme! Hope it lasts..

Unreal

Mine has plenty of miles and has been the most trouble free belt setup I've had on the car. Glad I could help. Feel free to get ahold of me if you have any other issues.

Xtremespeed

Really appreciate that.

Monte4ever

How's that cog belt holding up Xtremespeed?

Xtremespeed

Perfect. Been 14+ hours in the car for the tune and 12+ hours this weekend to Eureka Springs for Corvette Weekend. Lots of full throttle passes also. After I figured out the proper tension, the cog has been flawless. Love it.

ajrothm

I've got 2k miles on my cog belt, many hits, did 500 miles in one day, no issues.

Monte4ever

That's good to here fellas. Ima pull the trigger and get me one in about a month. Ajrothm, looks like you are using a iron block. Are you just using two of the three bolts that hold the cog and cog tensioner bracket? If so, how is it holding up?

ajrothm

I have a 6.0 iron block, it is drilled/tapped for the 3rd hole for the direct drive. I don't think I'd try it with 2 bolts.

SquatchMachining

Perhaps I am confused, but how did you drill and tap the block for the 3rd hole when the Iron block does not have the boss casted into it?


The photos you posted on page two only show two bolts holding the jackshaft pulley bracket on, like all iron block users do. The iron block does not have the boss next to the timing cover.


Am I missing something? Ive always just used the one exhisting hole and drilled/tapped the upper hole and held them on with two bolts.

Unreal

A bolt fell out of mine, no idea when but it worked pretty damn good